Pixel-Composer/scripts/gradients_function/gradients_function.gml

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2022-01-13 05:24:03 +01:00
enum GRADIENT_INTER {
smooth,
none
}
function draw_gradient(_x, _y, _w, _h, _grad, _int = GRADIENT_INTER.smooth) {
static RES = 48;
var _step = _w / RES;
var _ox, _oc;
for(var i = 0; i <= RES; i++) {
var _nx = _x + _step * i;
var _nc = gradient_eval(_grad, i / RES, _int);
if(i) {
switch(_int) {
case GRADIENT_INTER.smooth :
draw_rectangle_color(_ox, _y, _nx, _y + _h, _oc, _nc, _nc, _oc, false);
break;
case GRADIENT_INTER.none :
draw_set_color(_nc);
draw_rectangle(_ox, _y, _nx, _y + _h, false);
break;
}
}
_ox = _nx;
_oc = _nc;
}
}
function gradient_eval(_gradient, _time, _int = GRADIENT_INTER.smooth) {
if(ds_list_size(_gradient) == 0) return c_white;
if(ds_list_size(_gradient) == 1) return _gradient[| 0].value;
for(var i = 0; i < ds_list_size(_gradient); i++) {
var _key = _gradient[| i];
if(_key.time >= _time) {
if(i == 0)
return _gradient[| 0].value;
else {
var c0 = _gradient[| i - 1].value;
if(_int == GRADIENT_INTER.smooth) {
var rat = (_time - _gradient[| i - 1].time) / (_gradient[| i].time - _gradient[| i - 1].time);
var c1 = _gradient[| i].value;
return merge_color(c0, c1, rat);
} else if(_int == GRADIENT_INTER.none) {
return c0;
}
}
}
}
return _gradient[| ds_list_size(_gradient) - 1].value;
}
function gradient_add(_gradient, _addkey, _deleteDup) {
if(ds_list_size(_gradient) == 0) {
ds_list_add(_gradient, _addkey);
return;
}
for(var i = 0; i < ds_list_size(_gradient); i++) {
var _key = _gradient[| i];
if(_key.time == _addkey.time) {
if(_deleteDup)
_key.value = _addkey.value;
return;
} else if(_key.time > _addkey.time) {
ds_list_insert(_gradient, i, _addkey);
return;
}
}
ds_list_add(_gradient, _addkey);
}